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Carlos Cardoso photo
Japan, Tokyo
1 Level
637 Review
32 Karma

Review on NGK BR9HS 10 Standard Spark Plug by Carlos Cardoso

Revainrating 5 out of 5

Works great in my Merc 40hp 4 stroke 2 stroke!

I was referring to these plugs which are recommended for 40hp Merc outboards. Surface gaps clog much quicker than a standard plug for one reason or another. I will buy more over time

Pros
  • Cold rolled threads to prevent cross threads and damage to cylinder heads
Cons
  • Wrinkled